Bluetooth Audio Module
Ehong Technology Co., Ltd
8. Mechanical and PCB Footprint Characteristics ...................................................................................... 27
9. RF Layout Guidelines .................................................................................................................................... 28
10. Reflow Profile ............................................................................................................................................... 29
11. Contact Information ................................................................................................................................... 30
2. Table of Tables
TABLE 1: RECOMMENDED OPERATING CONDITIONS .................................................................................................... 5
TABLE 2: ABSOLUTE MAXIMUM RATING RECOMMENDED OPERATING CONDITIONS ................................................... 5
TABLE 3: POWER CONSUMPTIONS ................................................................................................................................ 7
TABLE 4: DIGITAL TERMINAL ......................................................................................................................................... 8
TABLE 5: USB TERMINAL .............................................................................................................................................. 8
TABLE 6: ANALOGUE TO DIGITAL CONVERTER ............................................................................................................. 9
TABLE 7: DIGITAL TO ANALOGUE CONVERTER ........................................................................................................... 10
TABLE 8:PIN
TERMINAL DESCRIPTION
..................................................................................................................... 13
TABLE 9: PIN STATUS ON RESET ................................................................................................................................ 14
TABLE 10: POSSIBLE UART SETTINGS ...................................................................................................................... 15
TABLE 11: ALTERNATIVE FUNCTIONS OF THE DIGITAL AUDIO BUS INTERFACE ON THE PCM INTERFACE ............... 18
TABLE 12 : DIGITAL AUDIO INTERFACE SLAVE TIMING ............................................................................................... 21
TABLE 13 : DIGITAL AUDIO INTERFACE MASTER TIMING............................................................................................ 21
TABLE 14: USB INTERFACE COMPONENT VALUES .................................................................................................... 25
3. Table of Figures
FIGURE 1:PINOUT OF EH-MB18.............................................................................................................................. 10
FIGURE 2:POWER SUPPLY PCB DESIGN ................................................................................................................ 13
FIGURE 3:CONNECTION TO HOST DEVICE ............................................................................................................... 15
FIGURE 4 : EXAMPLE EEPROM CONNECTION WITH I
2
C INTERFACE ........................................................................ 16
FIGURE 5 : APPLE CO-PROCESSOR 2.0C ................................................................................................................... 16
FIGURE 6 : APPLE CO-PROCESSOR 2.0B ................................................................................................................... 17
FIGURE 7 : AUDIO INTERFACE ..................................................................................................................................... 18
FIGURE 8 : DIGITAL AUDIO INTERFACE MODES .......................................................................................................... 20
FIGURE 9 : DIGITAL AUDIO INTERFACE SLAVE TIMING ............................................................................................... 21
FIGURE 10 : DIGITAL AUDIO INTERFACE MASTER TIMING .......................................................................................... 21
FIGURE 11
: EXAMPLE CIRCUIT FOR SPDIF INTERFACE (CO-AXIAL)
........................................................................ 22
FIGURE 12: EXAMPLE CIRCUIT FOR SPDIF INTERFACE (OPTICAL) ........................................................................... 22
FIGURE 13: MICROPHONE BIASING (SINGLE CHANNEL
S
HOWN
)
............................................................................... 23
FIGURE 14: SPEAKER OUTPUT .................................................................................................................................... 24
FIGURE 15: USB CONNECTIONS ................................................................................................................................ 25
FIGURE 16: REFERENCE DESIGN ............................................................................................................................... 26
FIGURE 17: RECOMMENDED PCB MOUNTING PATTERN (UNIT: MM, DEVIATION:0.02MM)TOP VIEW ..................... 27
FIGURE 18: CLEARANCE AREA OF ANTENNA ............................................................................................................. 28
FIGURE 19: RECOMMENDED REFLOW PROFILE ......................................................................................................... 29